Question

What is meta Directing effect?

Answer 1

Meta directing effect:

1. The meta-directing effect occurs when the electron density is taken from the ortho and para locations so that there is an increase in the reaction at the meta position.
2. From the ortho and para position, the electron density is drawn such that the reaction at the meta position increases, this is called the meta-directing effect.
3. $\mathrm{CN}\left(\mathrm{Cynaide}\right)$ and ${\mathrm{NO}}_2(\mathrm{Nitrogen}\mathrm{Dioxide})$ shows this effect.
4. The groups that align the incoming group to meta position directly during an electrophillic reaction, are called meta-directing groups.
5. Carbonyl compounds, nitriles, and alkylammoniums are some examples of meta-directing groups.